Second
Second (SI symbol: s), jske kabhi abhi sec.
Aur dekho
- Atomic clock
- Becquerel
- Hertz
- International Atomic Time
- International System of Units
- Leap second
- Magneto-optical trap
- Time standard
References
External links
Wiki Commons me Second ke baare me kuchh media hae.
- National Physical Laboratory: Trapped ion optical frequency standards
- High-accuracy strontium ion optical clock; National Physical Laboratory (2005)
- National Research Council of Canada: Optical frequency standard based on a single trapped ion Archived 2008-03-14 at the Wayback Machine
- NIST: Definition of the second; notice the cesium atom must be in its ground state at 0 K
- Official BIPM definition of the second
- Seconds and leap seconds by the USNO Archived 1996-11-26 at the Wayback Machine
- The leap second: its history and possible future
- What is a Cesium atom clock? Archived 2009-02-20 at the Wayback Machine
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